Calculation of a stripped gravity map with a high degree of accuracy: a case study of Liptovská Kotlina Basin (Northern Slovakia)

Authors

  • Eva Szalaiová Faculty of Natural Sciences, University of Comenius, Mlynská dolina, 842 15 Bratislava, Slovak Republic
  • Miroslav Bielik Faculty of Natural Sciences, University of Comenius, Mlynská dolina, 842 15 Bratislava, Slovak Republic
  • Irina Makarenko Institute of the Geophysics, National Academy of Sciences, Palladin av., Kiev-142, 036 80 Ukraine
  • Olga Legostaeva Institute of the Geophysics, National Academy of Sciences, Palladin av., Kiev-142, 036 80 Ukraine
  • Jozef Hók Faculty of Natural Sciences, University of Comenius, Mlynská dolina, 842 15 Bratislava, Slovak Republic
  • Vitalij Starostenko Institute of the Geophysics, National Academy of Sciences, Palladin av., Kiev-142, 036 80 Ukraine
  • Martin Sujan EQUIS, Ltd., 831 02 Bratislava, Slovak Republic
  • Ján Sefara Geophysical Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 28 Bratislava, Slovak Republic

Keywords:

pre-Tertiary basement, Central Carpathian Paleogene, Liptovská Kotlina Basin, gravity, stripped gravity map, 2D and 3D

Abstract

The paper deals with the construction and calculation of a stripped gravity map with a high degree of accuracy. In the Western Carpathian basins such types of gravity maps represent the corrected Bouguer anomalies by the gravity effects of the Tertiary sedimentary masses. It means that the resultant stripped gravity map reflects the gravity effects of density inhomogeneities, which are located beneath the pre-Tertiary basement. For determination of this map, the modern progressive forward-modelling gravity method was applied. The advantage of this method in comparison with previous approaches is that it is capable of calculating the 3D gravity effects of the geological bodies with real topography. A case study for presentation of a new and precise stripped gravity map, the Liptovská Kotlina Basin, was chosen, because it is one of the best-surveyed basins in the Western Carpathians. This new gravity map represents, for this moment, the most accurate stripped gravity map in the whole Western Carpathians. It allows construction not only of a very precise 3D gravity model of the sedimentary fill but also enables interpretation of the sources of the gravity anomalies revealed in the stripped gravity map. This interpretation is based on all available geophysical and geological constraining data. It is also supported by 2D analysis of the gravity effects of the main tectonic units building the Liptovská Kotlina Basin.

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Published

2010-03-27

Issue

Vol. 52 No. 2 (2008)

Section

Articles

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